Muffler.



F. w. BECKER.

MUFFLER- APPLICATION FILED SEPT 23, 1915- 1 ,1 86,067. Patented June 6,1916.

2 SHEETS-SHEET I.

.HHHII 50 L za a0 INVENTOR F. W. BECKER.

MUFFLER.

. APPLICATION FILED SEPT. 28, $915 1,1 86,067 Patented June 6, 1916.

2 SHEETS-SHEET 2.

MWMM

ATTORNEY UNITED STATES PATENT OFFICE.

FREDRICK W. BECKER, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OFONE- I-IALF TO WILLIAM A. RAWLINGS, OF WASHINGTON, DISTRICT OF COLUMBIA.

MUFFLER.

Specification of Letters Patent.

Patented June 6, 1916.

Application filed September 28, 1915; Serial No. 53,153.

To all whom it may concern:

Be it known that I, FREDRICK W. BECKER, a citizen of the United States,residing at lVashington, in the District of Columbia, have inventedcertain new and useful 1mprovements in Mufllers, of which-the followingis a specification.

This invention relates to an improved inufiier and the principal objectof the invention is to provide a mufiler with an improved type of battleplates so constructed and assembled as to eliminate back pressure andprevent noise.

Another object of the invention is to so construct the battle platesthat a small portion of the gases may pass directly through the plateswhen striking the same, the greater portion of the gases being retardedand caused to take a tortuous course through the mufiier.

Another object ofthe invention 1s to so mount the bafile plates as topermit of easy removal from the casing when cleaning the muflier.

"This invention is illustrated in the accompanying drawings, whereinFigure 1 is a view in longitudinal sect on through the mufller, Fig. 2is a view showing the muffler in end elevation, and Fig. 3 through 12are views in elevation of the battle plates which are shown in Fig. 1.

This muflier is provided with a cylindrical casing -10 which may be ofany suitable length and diameter and has its ends closed by the caps 11and 12, the inlet pipe 13 being connected with the cap 12 and the outletpipe 14 leading from cap 11. These pipes 13 and 14 may be removablyconnected with the caps 11 and 12 in any suitable manner, but for thepurpose of illustration, they have been shown screwed into theenlargements 15 and secured by the locking nuts 16.

Within the casing 10 there is provided the bafiie plates 17, 18, i9, 20,21, 22, 23, 24, 25 and 26 each of which is provided to one side of thecenter with a relatively large opening 27 through which the greaterortion of the gases will pass as they trave through the mullier. Itshould be noted that these openings are positioned in staggered relationas shown in Fig. 1 and therefore the gases will be guided through thecasing in a tortuous course. The 0 posite side portions of the firsteight ba e plates are provided with 5 relatively small openings 28,which are preferably arranged as shown in Figs. 3 through 10 but whichmay be grouped in any other manner if desired. It should be noted,however, that the openings 28 decrease in number from plate 17 to plate24, this being an essential feature of the invention as will behereinafter brought out in the description of the operation. The lasttwo plates 25 and 26 are not provided with openings 28 as these twoplates do not require them.

In assembling this muflier the casing 10 is cut the proper length andafter tongues 29 of the baffle plates are bent as shown, the plates areput in place as shown in Fig. l and secured by the removable fasteners30. The caps 11 and 12 are now put in place and the securing bolts 31'which pass through the openings 32 in the baflle plates and assist inholding the plates in the proper position are put in place and tightenedthus securely holding the caps upon the casing in tight engagementtherewith. It is obvious that if desired one cap and the bolts can befirst put in place and the baflie plates then slipped into the casingupon the bolts thus causing the plates to pass into the casing in theproper position to permit the removable fasteners to engage the tongues29.

When the mufiler is in use the gases from the engine enter the casingthrough the pipe 13 and strike that portion of the plate 17 having thesmall openings formed therein. A portion of the gases will pass throughthe small openings but most of the gases will move across the casing andass through the large opening 27 of plate 1* and strike plate 18. Thisplate is provided with a fewer number of small openings than plate 17and while they will permit a portion of the gases to pass directlythrough the plate, a larger proportion of the gases will pass across thecasing and pass through the large openings of plate 18 to strike plate19. This is repeated until the gases have passed through plate 24, theproportion of gases passing through the large openings increasing witheach plate as the small openings decrease in number. Plates 25 and 26are only provided with openings 27 as by the time the ings positioned instaggered relation and small. openings decreasing in number toward theoutlet end of the casin prevents noise and further prevents bac pressure5 which would'decrease the power of the engine.

When it is desired to clean the mufller the bolts 31 are removed, thecaps taken ofi the casing and after fasteners are removed, the platestaken out. The casing, plates and caps can then be easily and thoroughlycleaned and the mufiler assembled.

What is claimed is caps for said casing provided with passageways, anddisks mounted in said casing andv alinement with the large openings ofthe adjoining plates. I

3. A muffler comprising a casing having an inlet and an outlet, andvertically extend ing baflleplates in said casing for directing thepassage-of gases through the same, the

this patent my be ebtelned ter '1 A mufller comprising a casing, closurewit relative y small openings positioned in me eente eeeh, by addressingD. a." I v plates being provided with openings decreasmg in number fromthe inlet end toward 'the outlet end of the casing.

4'. A mufller comprisin a casing having an inlet and; an outlet, anvertically extending bafiling means removably mounted in said casing andpositioned in overlapping relation to guide gases throu h .the casing ina tortuous course, the bailimg means being provided with openingspermitting a portion of the gases to pass directly through the sameowhenstriking the baflling means and the openings of the succeeding bafilingmeans decreasing in number from the inlet end toward the outlet end ofsaid casing.

' 5. A mufller comprising a casing, and vertically extending bafllingmeans in said casing provided with openings, the openings of thesucceeding plates decreasing in number from the. inlet toward the outletend of said casing.

6. A mufiler com rising a casing, and bafile plates provide withrelatively large openings forming main as passages and relatively smallopenings ormmg auxiliary gas passages, the, auxiliary gas passages ofthe succeeding plates decreasing in number from the inlet end toward theoutlet end of said casing. a

I In testimony whereof I ,afiix my signature in presence of twowitnesses.

I FREDBICK w. BECKER. witnesses! I Ross J. Woonwann,

R. STUNZ.

the Commoner 0! Patents,

